Security-57031.1.35.tar.gz

[apple/security.git] / Security / libsecurity_cdsa_utilities / lib / cssmcred.cpp

diff --git a/Security/libsecurity_cdsa_utilities/lib/cssmcred.cpp b/Security/libsecurity_cdsa_utilities/lib/cssmcred.cpp
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+/*
+ * Copyright (c) 2000-2001,2003-2004,2006,2011,2014 Apple Inc. All Rights Reserved.
+ * 
+ * @APPLE_LICENSE_HEADER_START@
+ * 
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this
+ * file.
+ * 
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ * 
+ * @APPLE_LICENSE_HEADER_END@
+ */
+
+
+//
+// cssmcred - enhanced PodWrappers and construction aids for ACL credentials
+//
+#include <security_cdsa_utilities/cssmcred.h>
+
+
+namespace Security {
+
+
+//
+// The null credential constant.
+//
+static const CSSM_ACCESS_CREDENTIALS null_credentials = { "" };        // and more nulls
+#if BUG_GCC
+const AccessCredentials &AccessCredentials::null =
+    *static_cast<const AccessCredentials *>(&null_credentials);
+#else
+const AccessCredentials &AccessCredentials::null =
+    static_cast<const AccessCredentials &>(null_credentials);
+#endif
+
+
+//
+// Scan a SampleGroup for samples with a given CSSM_SAMPLE_TYPE.
+// Collect all matching samples into a list (which is cleared to begin with).
+// Return true if any were found, false if none.
+// Throw if any of the samples are obviously malformed.
+//
+bool SampleGroup::collect(CSSM_SAMPLE_TYPE sampleType, list<CssmSample> &matches) const
+{
+       for (uint32 n = 0; n < length(); n++) {
+               TypedList sample = (*this)[n];
+               sample.checkProper();
+               if (sample.type() == sampleType) {
+                       sample.snip();  // skip sample type
+                       matches.push_back(sample);
+               }
+       }
+       return !matches.empty();
+}
+
+
+//
+// AccessCredentials
+//
+void AccessCredentials::tag(const char *tagString)
+{
+       if (tagString == NULL)
+               EntryTag[0] = '\0';
+       else if (strlen(tagString) > CSSM_MODULE_STRING_SIZE)
+               CssmError::throwMe(CSSM_ERRCODE_INVALID_ACL_ENTRY_TAG);
+       else
+               strcpy(EntryTag, tagString);
+}
+
+
+//
+// AutoCredentials self-constructing credentials structure
+//
+AutoCredentials::AutoCredentials(Allocator &alloc) : allocator(alloc)
+{
+       init();
+}
+
+AutoCredentials::AutoCredentials(Allocator &alloc, uint32 nSamples) : allocator(alloc)
+{
+       init();
+       getSample(nSamples - 1);        // extend array to nSamples elements
+}
+
+void AutoCredentials::init()
+{
+       sampleArray = NULL;
+       nSamples = 0;
+}
+
+
+CssmSample &AutoCredentials::getSample(uint32 n)
+{
+       if (n >= nSamples) {
+               sampleArray = allocator.alloc<CssmSample>(sampleArray, nSamples = n + 1);
+               Samples.Samples = sampleArray;
+               Samples.NumberOfSamples = nSamples;
+       }
+       return sampleArray[n];
+}
+
+}      // end namespace Security